1/* 2 * Linux ethernet bridge 3 * 4 * Authors: 5 * Lennert Buytenhek <buytenh@gnu.org> 6 * 7 * $Id: br_private.h,v 1.1.1.1 2007/08/03 18:53:50 Exp $ 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15#ifndef _BR_PRIVATE_H 16#define _BR_PRIVATE_H 17 18#include <linux/netdevice.h> 19#include <linux/if_bridge.h> 20 21#define BR_HASH_BITS 8 22#define BR_HASH_SIZE (1 << BR_HASH_BITS) 23 24#define BR_HOLD_TIME (1*HZ) 25 26#define BR_PORT_BITS 10 27#define BR_MAX_PORTS (1<<BR_PORT_BITS) 28 29#define BR_VERSION "2.3" 30 31/* Path to usermode spanning tree program */ 32#define BR_STP_PROG "/sbin/bridge-stp" 33 34typedef struct bridge_id bridge_id; 35typedef struct mac_addr mac_addr; 36typedef __u16 port_id; 37 38struct bridge_id 39{ 40 unsigned char prio[2]; 41 unsigned char addr[6]; 42}; 43 44struct mac_addr 45{ 46 unsigned char addr[6]; 47}; 48 49struct net_bridge_fdb_entry 50{ 51 struct hlist_node hlist; 52 struct net_bridge_port *dst; 53 54 struct rcu_head rcu; 55 atomic_t use_count; 56 unsigned long ageing_timer; 57 mac_addr addr; 58 unsigned char is_local; 59 unsigned char is_static; 60}; 61 62struct net_bridge_port 63{ 64 struct net_bridge *br; 65 struct net_device *dev; 66 struct list_head list; 67 68 /* STP */ 69 u8 priority; 70 u8 state; 71 u16 port_no; 72 unsigned char topology_change_ack; 73 unsigned char config_pending; 74 port_id port_id; 75 port_id designated_port; 76 bridge_id designated_root; 77 bridge_id designated_bridge; 78 u32 path_cost; 79 u32 designated_cost; 80 81 struct timer_list forward_delay_timer; 82 struct timer_list hold_timer; 83 struct timer_list message_age_timer; 84 struct kobject kobj; 85 struct rcu_head rcu; 86}; 87 88struct net_bridge 89{ 90 spinlock_t lock; 91 struct list_head port_list; 92 struct net_device *dev; 93 struct net_device_stats statistics; 94 spinlock_t hash_lock; 95 struct hlist_head hash[BR_HASH_SIZE]; 96 struct list_head age_list; 97 unsigned long feature_mask; 98 99 /* STP */ 100 bridge_id designated_root; 101 bridge_id bridge_id; 102 u32 root_path_cost; 103 unsigned long max_age; 104 unsigned long hello_time; 105 unsigned long forward_delay; 106 unsigned long bridge_max_age; 107 unsigned long ageing_time; 108 unsigned long bridge_hello_time; 109 unsigned long bridge_forward_delay; 110 111 u8 group_addr[ETH_ALEN]; 112 u16 root_port; 113 114 enum { 115 BR_NO_STP, /* no spanning tree */ 116 BR_KERNEL_STP, /* old STP in kernel */ 117 BR_USER_STP, /* new RSTP in userspace */ 118 } stp_enabled; 119 120 unsigned char topology_change; 121 unsigned char topology_change_detected; 122 123 struct timer_list hello_timer; 124 struct timer_list tcn_timer; 125 struct timer_list topology_change_timer; 126 struct timer_list gc_timer; 127 struct kobject ifobj; 128}; 129 130extern struct notifier_block br_device_notifier; 131extern const u8 br_group_address[ETH_ALEN]; 132 133/* called under bridge lock */ 134static inline int br_is_root_bridge(const struct net_bridge *br) 135{ 136 return !memcmp(&br->bridge_id, &br->designated_root, 8); 137} 138 139/* br_device.c */ 140extern void br_dev_setup(struct net_device *dev); 141extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 142 143/* br_fdb.c */ 144extern int br_fdb_init(void); 145extern void br_fdb_fini(void); 146extern void br_fdb_flush(struct net_bridge *br); 147extern void br_fdb_changeaddr(struct net_bridge_port *p, 148 const unsigned char *newaddr); 149extern void br_fdb_cleanup(unsigned long arg); 150extern void br_fdb_delete_by_port(struct net_bridge *br, 151 const struct net_bridge_port *p, int do_all); 152extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 153 const unsigned char *addr); 154extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 155 unsigned char *addr); 156extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 157extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 158 unsigned long count, unsigned long off); 159extern int br_fdb_insert(struct net_bridge *br, 160 struct net_bridge_port *source, 161 const unsigned char *addr); 162extern void br_fdb_update(struct net_bridge *br, 163 struct net_bridge_port *source, 164 const unsigned char *addr); 165 166/* br_forward.c */ 167extern void br_deliver(const struct net_bridge_port *to, 168 struct sk_buff *skb); 169extern int br_dev_queue_push_xmit(struct sk_buff *skb); 170extern void br_forward(const struct net_bridge_port *to, 171 struct sk_buff *skb); 172extern int br_forward_finish(struct sk_buff *skb); 173extern void br_flood_deliver(struct net_bridge *br, 174 struct sk_buff *skb, 175 int clone); 176extern void br_flood_forward(struct net_bridge *br, 177 struct sk_buff *skb, 178 int clone); 179 180/* br_if.c */ 181extern void br_port_carrier_check(struct net_bridge_port *p); 182extern int br_add_bridge(const char *name); 183extern int br_del_bridge(const char *name); 184extern void br_cleanup_bridges(void); 185extern int br_add_if(struct net_bridge *br, 186 struct net_device *dev); 187extern int br_del_if(struct net_bridge *br, 188 struct net_device *dev); 189extern int br_min_mtu(const struct net_bridge *br); 190extern void br_features_recompute(struct net_bridge *br); 191 192/* br_input.c */ 193extern int br_handle_frame_finish(struct sk_buff *skb); 194extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 195 struct sk_buff *skb); 196 197/* br_ioctl.c */ 198extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 199extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg); 200 201/* br_netfilter.c */ 202#ifdef CONFIG_BRIDGE_NETFILTER 203extern int br_netfilter_init(void); 204extern void br_netfilter_fini(void); 205#else 206#define br_netfilter_init() (0) 207#define br_netfilter_fini() do { } while(0) 208#endif 209 210/* br_stp.c */ 211extern void br_log_state(const struct net_bridge_port *p); 212extern struct net_bridge_port *br_get_port(struct net_bridge *br, 213 u16 port_no); 214extern void br_init_port(struct net_bridge_port *p); 215extern void br_become_designated_port(struct net_bridge_port *p); 216 217/* br_stp_if.c */ 218extern void br_stp_enable_bridge(struct net_bridge *br); 219extern void br_stp_disable_bridge(struct net_bridge *br); 220extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 221extern void br_stp_enable_port(struct net_bridge_port *p); 222extern void br_stp_disable_port(struct net_bridge_port *p); 223extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 224extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 225extern void br_stp_set_bridge_priority(struct net_bridge *br, 226 u16 newprio); 227extern void br_stp_set_port_priority(struct net_bridge_port *p, 228 u8 newprio); 229extern void br_stp_set_path_cost(struct net_bridge_port *p, 230 u32 path_cost); 231extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 232 233/* br_stp_bpdu.c */ 234extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev, 235 struct packet_type *pt, struct net_device *orig_dev); 236 237/* br_stp_timer.c */ 238extern void br_stp_timer_init(struct net_bridge *br); 239extern void br_stp_port_timer_init(struct net_bridge_port *p); 240extern unsigned long br_timer_value(const struct timer_list *timer); 241 242/* br.c */ 243extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 244 unsigned char *addr); 245extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 246 247 248/* br_netlink.c */ 249extern int br_netlink_init(void); 250extern void br_netlink_fini(void); 251extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 252 253#ifdef CONFIG_SYSFS 254/* br_sysfs_if.c */ 255extern struct sysfs_ops brport_sysfs_ops; 256extern int br_sysfs_addif(struct net_bridge_port *p); 257 258/* br_sysfs_br.c */ 259extern int br_sysfs_addbr(struct net_device *dev); 260extern void br_sysfs_delbr(struct net_device *dev); 261 262#else 263 264#define br_sysfs_addif(p) (0) 265#define br_sysfs_addbr(dev) (0) 266#define br_sysfs_delbr(dev) do { } while(0) 267#endif /* CONFIG_SYSFS */ 268 269#endif 270